Number of undirected labeled graphs on 2n nodes with exactly n cycle graphs as connected components.

A253276

Number of undirected labeled graphs on 2n nodes with exactly n cycle graphs as connected components.

Terms

    a(0) =1a(1) =1a(2) =7a(3) =120a(4) =3157a(5) =109935a(6) =4754200a(7) =245722477a(8) =14779601837

External references